A photograph is an image made by exposing a negative to a surface that is sensitive to light. Usually made on paper, photographic images can also be made on any surface that can be coated with a light-sensitive material, including cloth, canvas, ivory, and tin.
1. Cyrus Field / Mathew Brady Studio
2. Ulysses S. Grant / Mathew Brady Studio
3. Julia Dent Grant / Mathew Brady Studio